Leaky Jobo tanks can be easily cured with a short money fix - just install a new red rubber cap (get a couple for under 10$). They ware out over time, and a new one should be leak proof for quite some time.
Mind was new and leaking, bought another and leaked too, bought a Paterson ... No leaks on all 3 because their caps allow for expansion from pressure, JOBO's don't.
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~Stone | "...of course, that's just my opinion. I could be wrong."~Dennis Miller